从ActiveRecord范围中删除订单 [英] Remove order from ActiveRecord scope

问题描述

我正在使用Rails ransack（ https://github.com/ernie/ransack ）允许用户过滤和排序一些记录。我使用传统方法获得了经过过滤和排序的记录。

I'm using rails ransack ( https://github.com/ernie/ransack ) to allow the users to filter and sort some records. I get the filtered and sorted records using traditional methods.

 @invoices = Invoice.search(params[:q]).result

现在我想获得一些摘要信息，所以我有

Now I would like to get some summary information so I have

 @invoices = Invoice.search(params[:q]).result
 @summary = @invoices.select("sum(balance) as balance_total").first

用户指定要排序的字段时除外。我收到SQL错误：

Except when the user specifies a field to sort. I get the SQL error:

 Column "project_name" is invalid in the ORDER BY clause because 
 it is not contained in either an aggregate function or the GROUP BY clause

我可以从范围中删除排序吗？

Can I remove the sort from the scope? How?

谢谢

推荐答案

您可以致电重新排序方法，其中包含空字符串。例如：

You can call the reorder method with an empty string. E.g.:

> Article.order('headline asc').to_sql
=> "SELECT `articles`.* FROM `articles`  ORDER BY headline asc"
> Article.order('headline asc').reorder('').to_sql
=> "SELECT `articles`.* FROM `articles` "

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